161542455 has 16 divisors (see below), whose sum is σ = 269706240. Its totient is φ = 82409888.

The previous prime is 161542453. The next prime is 161542487. The reversal of 161542455 is 554245161.

161542455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161542455 - 2¹ = 161542453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161542453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233775 + ... + 234464.

It is an arithmetic number, because the mean of its divisors is an integer number (16856640).

Almost surely, 2^161542455 is an apocalyptic number.

161542455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161542455 is a deficient number, since it is larger than the sum of its proper divisors (108163785).

161542455 is a wasteful number, since it uses less digits than its factorization.

161542455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468270.

The product of its digits is 24000, while the sum is 33.

The square root of 161542455 is about 12709.9352870107. The cubic root of 161542455 is about 544.6224751288.

The spelling of 161542455 in words is "one hundred sixty-one million, five hundred forty-two thousand, four hundred fifty-five".